/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/MeshTangents.h
Compute per-triangle tangents for the given UV Overlay
void ComputeTriangleTangents ( const [FDynamicMeshUVOverlay](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshUVOverlay) * UVOverlay, bool bOrthogonalize )